diff --git a/mail/js/app.js b/mail/js/app.js
index 398fd93e5e..6d7954d6f9 100644
--- a/mail/js/app.js
+++ b/mail/js/app.js
@@ -3584,7 +3584,7 @@ app.classes.mail = AppJS.extend(
 	 */
 	loadIframe: function (_url, _iFrame)
 	{
-		var mailSplitter = this.et2.getWidgetById('mailSplitter');
+		var mailSplitter = this.et2.getWidgetById('mail.index.spliter');
 		var quotaipercent = this.et2.getWidgetById('nm[quotainpercent]');
 		var iframe = _iFrame || this.et2.getWidgetById('extra_iframe');
 		if (typeof iframe != 'undefined' && iframe)